Abstract:    People tend to have a richer material and cultural life, so leisure activities become more and more abundant. In addition, leisure activities can create "psychological availability" for employees to maintain work commitments and enable employees to obtain the physical, cognitive and emotional resources needed to achieve role performance. However, the prevailing "996" working system limits the positive impact of leisure on work, which leads to the unsustainability of human capital development. Therefore, it is necessary to explore the impact of leisure activities on work engagement, which helps enterprises to implement leisure time management, identify, screen and implement appropriate leisure projects, and help employees to use their leisure time more effectively and promote the sustainable use of human capital.
    It may be easily found from systematic review of related literature that leisure participation can indeed increase the work engagement of employees. However, the influence on work engagement is different between the individual′s low-effort activities characterized by high passivity and low resource consumption and the leisure crafting characterized by goal setting, interpersonal relationship construction, learning and personal development. In other words, different types of leisure activities have different effects on job engagement. However, previous studies have not compared the impact of various types of leisure activities, and unclear classification standards also lead to many types of leisure activities being ignored.
   According to the conservation of resources theory, people will try their best to maintain, protect and accumulate various resources. Work needs a lot of resources. Individuals can supplement resources by temporarily reducing pressure sources, or invest other resources to obtain new resources, and then put into a new round of work in a full state. According to the psychological conditions of personal engagement at work, the extent to which employees bring themselves into work roles is affected by three psychological conditions, which are psychological meaning, psychological security and psychological availability, leisure participation can enhance the psychological availability of employees. This paper explores the mediating effects of recovery experience in the relationship between leisure activities and employees′ work engagement, and the moderating role of career development pressures in it. Based on the consumption of leisure activities on the individual′s physical and mental resources and the motivation for leisure participation, it distinguishes between two types of leisure methods of low-effort activities and leisure crafting, and explores the significance of low-effort activities and leisure crafting for work engagement. 
    Based on relevant theories, this study puts forward research hypotheses and theoretical models, and selects a scale with good reliability and validity to conduct a questionnaire survey on 232 employees from Chinese companies in Wuhan, Beijing, Shanghai, Guangzhou and other regions. A total of 265 questionnaires were collected, remove 33 questionnaires with obvious problems, and 232 valid questionnaires were finally obtained. Then through SPSS 22.0, Amos 23.0 and Mplus7.0 software to analyze the data, through the intermediary effect test, regression analysis and adjustment test, the results show that: first, low-effort activities and leisure crafting can help to improve the work engagement of employees, and leisure crafting can improve the work engagement of employees more than low-effort activities. Second, recovery experience plays an intermediary role in the low-effort activities and leisure crafting the positive relationship to work engagement, but the ultimate recovery effect of employees depends on how much recovery experience can be brought by leisure activities. Third, the mediated effects of low-effort activities and leisure crafting on work engagement is moderated by the employees′ career development stressors.
   There are three main theoretical contributions of this study: First, this paper confirms the positive correlation between leisure participation and work engagement, enriching the research on the relationship between leisure and professional happiness. Furthermore, this paper integrates the perspective of hedonism and self-determination of leisure study, and explores the leisure ways that are more conducive to improving professional happiness. Previous studies have suggested that "hedonism" and "self-determination" are different in the importance of happiness. This study further proves that there are differences in the effectiveness of these two different motivation-driven leisure styles on work engagement. At last, this paper enriches the study of the interactions between the psychological conditions of work engagement. The recovery path of leisure mainly plays a role by increasing the "psychological availability" of work engagement. This study found that career development pressure will affect the "psychological sense" of work, and this psychological condition has also been proved to be the most effective psychological condition for predicting work engagement.
    In general，this paper reached some valuable conclusions but there were still some limitations to be improved as follows: Firstly, this research uses a cross-sectional research design. Because the data of each variable collected at the same time, there may have common variance biases and other problems, we can use multi time point data collection design in the future, which can be used to better explore the robustness of causal effect and avoid the potential impact of common variance. Secondly, the exploration of leisure can be integrated with economics. From the perspective of sociology, management and organizational behavior, and explore the leisure lifestyle scale in Chinese context. Thirdly, this paper emphasizes the motivation of leisure participation. In the future, the research can explore whether these characteristics affect the recovery effect of leisure participation from the aspects of leisure quality and leisure satisfaction. At last, we can explore the influence of family on individual recovery process in the future.

Key words: leisure crafting, low-effort activity, work engagement, career development stressor